CA2557777C - Device and method for determining a quantiser step size - Google Patents
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- CA2557777C CA2557777C CA2557777A CA2557777A CA2557777C CA 2557777 C CA2557777 C CA 2557777C CA 2557777 A CA2557777 A CA 2557777A CA 2557777 A CA2557777 A CA 2557777A CA 2557777 C CA2557777 C CA 2557777C
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/032—Quantisation or dequantisation of spectral components
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L2019/0001—Codebooks
- G10L2019/0004—Design or structure of the codebook
- G10L2019/0005—Multi-stage vector quantisation
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Abstract
For determining a quantizer step size for quantizing a signal comprising audio or video information, a first quantizer step size as well as an interference threshold are provided (502). Then, the actual interference introduced by the first quantizer step size is determined (504) and compared with the interference threshold (506). Despite the fact that the comparison reveals that the actually introduced interference exceeds the threshold, a second, coarser quantizer step size is nevertheless used (508), which will then be used for quantization (514) if it turns out that the interference introduced by the coarser, second quantizer step size falls below the threshold or falls below the interference introduced by the first quantizer step size (512). Thus, the quantization interference is reduced while the quantization is coarsened and, thus, the compression gain is increased.
Claims (13)
1. An apparatus for determining a quantizer step size for quantizing a signal comprising audio or video information, the apparatus comprising:
a means for providing a first quantizer step size and an interference threshold, wherein the means for providing is configured to calculate the first quantizer step size in accordance with the following equation:
a means for determining a first interference introduced by the first quantizer step size;
a means for comparing the first interference introduced by the first quantizer step size with the interference threshold;
a means for selecting a second quantizer step size which is larger than the first quantizer step size if the first interference introduced exceeds the interference threshold;
a means for determining a second interference introduced by the second quantizer step size;
a means for comparing the second interference introduced with the interference threshold or the first interference introduced; and a means for quantizing the signal comprising audio or video information with the second quantizer step size if the second interference introduced is smaller than the first interference introduced or is smaller than the interference threshold so that a quantized signal comprising audio or video information is obtained, wherein the means for quantizing is configured to quantize in accordance with the following equation:
wherein x i is a spectral value to be quantized, wherein q represents a quantizer step size information, wherein s is a figure differing from or equaling zero, wherein .alpha. is an exponent different from "1", wherein round is a rounding function which maps a value from a first, larger range of values to a value within a second, smaller range of values, wherein is a permitted interference, and wherein i is a run index for spectral values in the frequency band.
a means for providing a first quantizer step size and an interference threshold, wherein the means for providing is configured to calculate the first quantizer step size in accordance with the following equation:
a means for determining a first interference introduced by the first quantizer step size;
a means for comparing the first interference introduced by the first quantizer step size with the interference threshold;
a means for selecting a second quantizer step size which is larger than the first quantizer step size if the first interference introduced exceeds the interference threshold;
a means for determining a second interference introduced by the second quantizer step size;
a means for comparing the second interference introduced with the interference threshold or the first interference introduced; and a means for quantizing the signal comprising audio or video information with the second quantizer step size if the second interference introduced is smaller than the first interference introduced or is smaller than the interference threshold so that a quantized signal comprising audio or video information is obtained, wherein the means for quantizing is configured to quantize in accordance with the following equation:
wherein x i is a spectral value to be quantized, wherein q represents a quantizer step size information, wherein s is a figure differing from or equaling zero, wherein .alpha. is an exponent different from "1", wherein round is a rounding function which maps a value from a first, larger range of values to a value within a second, smaller range of values, wherein is a permitted interference, and wherein i is a run index for spectral values in the frequency band.
2. The apparatus as claimed in claim 1, wherein the signal is an audio signal and comprises spectral values of a spectral representation of the audio signal, and wherein the means for providing is configured as a psycho-acoustic model which calculates the permitted interference for a frequency band on the basis of a psycho-acoustic masking threshold.
3. The apparatus as claimed in claim 1, wherein the means for determining the first interference introduced, or the means for determining the second interference introduced is configured to quantize using the quantizer step size, to re-quantize using the quantizer step size, and to calculate a distance between the re-quantized signal and the signal so as to obtain the interference introduced.
4. The apparatus as claimed in claim 1, wherein the means for selecting is further configured to select a larger quantizer step size when the interference introduced is smaller than the permitted interference.
5. The apparatus as claimed in claim 1, wherein the means for providing is configured to provide the first quantizer step size as a result of an analysis/synthesis determination.
6. The apparatus as claimed in claim 1 wherein the means for selecting is configured to alter the quantizer step size for one frequency band independently of the quantizer step size for another frequency band.
7. The apparatus as claimed in claim 1, wherein the means for providing is configured to determine the first quantizer step size as a result of a preceding iteration step with a coarsening of the quantizer step size, and wherein the interference threshold is an interference introduced in the preceding iteration step for determining the first quantizer step size.
8. A method for determining a quantizer step size for quantizing a signal comprising audio or video information, the method comprising:
providing a first quantizer step size and an interference threshold by calculating the first quantizer step size in accordance with the following equation:
determining a first interference introduced by the first quantizer step size;
comparing the first interference introduced with the interference threshold;
selecting a second quantizer step size which is larger than the first quantizer step size if the first interference introduced exceeds the interference threshold;
determining a second interference introduced by the second quantizer step size;
comparing the second interference introduced with the interference threshold or the first interference introduced;
quantizing the signal comprising audio or video information with the second quantizer step size if the second interference introduced is smaller than the first interference introduced or is smaller than the interference threshold, so that a quantized signal comprising audio or video information is obtained wherein the quantizing is performed in accordance with the following equation:
wherein x i is a spectral value to be quantized, wherein q represents a quantizer step size information, wherein s is a figure differing from or equaling zero, wherein a is an exponent different from "1", wherein round is a rounding function which maps a value from a first, larger range of values to a value within a second, smaller range of values, wherein is a permitted interference, and wherein i is a run index for spectral values in the frequency band.
providing a first quantizer step size and an interference threshold by calculating the first quantizer step size in accordance with the following equation:
determining a first interference introduced by the first quantizer step size;
comparing the first interference introduced with the interference threshold;
selecting a second quantizer step size which is larger than the first quantizer step size if the first interference introduced exceeds the interference threshold;
determining a second interference introduced by the second quantizer step size;
comparing the second interference introduced with the interference threshold or the first interference introduced;
quantizing the signal comprising audio or video information with the second quantizer step size if the second interference introduced is smaller than the first interference introduced or is smaller than the interference threshold, so that a quantized signal comprising audio or video information is obtained wherein the quantizing is performed in accordance with the following equation:
wherein x i is a spectral value to be quantized, wherein q represents a quantizer step size information, wherein s is a figure differing from or equaling zero, wherein a is an exponent different from "1", wherein round is a rounding function which maps a value from a first, larger range of values to a value within a second, smaller range of values, wherein is a permitted interference, and wherein i is a run index for spectral values in the frequency band.
9. A computer readable storage medium having recorded thereon instructions for execution by a computer to carry out the method according to claim 8.
10. Apparatus of claim 1, in which the rounding function is implemented as a nearest integer function.
11. An apparatus for determining a quantizer step size for quantizing a signal comprising audio or video information, the apparatus comprising:
a means for providing a first quantizer step size and an interference threshold;
a means for determining a first interference introduced by the first quantizer step size;
a means for comparing the first interference introduced with the interference threshold;
a means for selecting a second quantizer step size which is larger than the first quantizer step size if the first interference introduced exceeds the interference threshold;
a means for determining a second interference introduced by the second quantizer step size;
a means for comparing the second interference introduced with the interference threshold or the first interference introduced; wherein the second quantizer step size is stored, if the second interference introduced is smaller than the first interference introduced or is smaller than the interference threshold, wherein, in a further iteration step, a further quantizer step size is selected, the further quantizer step size being larger than the second quantizer step size, a means for quantizing the signal with the stored second quantizer step size if an interference introduced by the further quantizer step size is larger than the first interference introduced or is larger than the interference threshold, and for quantizing the signal with the further quantizer step size, if the interference introduced by the further quantizer step size is smaller than the second interference introduced or is smaller than the interference threshold.
a means for providing a first quantizer step size and an interference threshold;
a means for determining a first interference introduced by the first quantizer step size;
a means for comparing the first interference introduced with the interference threshold;
a means for selecting a second quantizer step size which is larger than the first quantizer step size if the first interference introduced exceeds the interference threshold;
a means for determining a second interference introduced by the second quantizer step size;
a means for comparing the second interference introduced with the interference threshold or the first interference introduced; wherein the second quantizer step size is stored, if the second interference introduced is smaller than the first interference introduced or is smaller than the interference threshold, wherein, in a further iteration step, a further quantizer step size is selected, the further quantizer step size being larger than the second quantizer step size, a means for quantizing the signal with the stored second quantizer step size if an interference introduced by the further quantizer step size is larger than the first interference introduced or is larger than the interference threshold, and for quantizing the signal with the further quantizer step size, if the interference introduced by the further quantizer step size is smaller than the second interference introduced or is smaller than the interference threshold.
12. A method for determining a quantizer step size for quantizing a signal comprising audio or video information, the method comprising:
providing a first quantizer step size and an interference threshold;
determining a first interference introduced by the first quantizer step size;
comparing the first interference introduced with the interference threshold;
selecting a second quantizer step size which is larger than the first quantizer step size if the first interference introduced exceeds the interference threshold;
determining a second interference introduced by the second quantizer step size;
comparing the second interference introduced with the interference threshold or the first interference introduced; wherein the second quantizer step size is stored, if the second interference introduced is smaller than the first interference introduced or is smaller than the interference threshold, wherein, in a further iteration step, a further quantizer step size is selected, the further quantizer step size being larger than the second quantizer step size, quantizing the signal with the stored second quantizer step size if an interference introduced by the further quantizer step size is larger than the first interference introduced or is larger than the interference threshold, and for quantizing the signal with the further quantizer step size, if the interference introduced by the further quantizer step size is smaller than the second interference introduced or is smaller than the interference threshold.
providing a first quantizer step size and an interference threshold;
determining a first interference introduced by the first quantizer step size;
comparing the first interference introduced with the interference threshold;
selecting a second quantizer step size which is larger than the first quantizer step size if the first interference introduced exceeds the interference threshold;
determining a second interference introduced by the second quantizer step size;
comparing the second interference introduced with the interference threshold or the first interference introduced; wherein the second quantizer step size is stored, if the second interference introduced is smaller than the first interference introduced or is smaller than the interference threshold, wherein, in a further iteration step, a further quantizer step size is selected, the further quantizer step size being larger than the second quantizer step size, quantizing the signal with the stored second quantizer step size if an interference introduced by the further quantizer step size is larger than the first interference introduced or is larger than the interference threshold, and for quantizing the signal with the further quantizer step size, if the interference introduced by the further quantizer step size is smaller than the second interference introduced or is smaller than the interference threshold.
13. A computer readable storage medium having recorded thereon instructions for execution by a computer to carry out the method according to claim 12.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004009955A DE102004009955B3 (en) | 2004-03-01 | 2004-03-01 | Device for determining quantizer step length for quantizing signal with audio or video information uses longer second step length if second disturbance is smaller than first disturbance or noise threshold hold |
| DE102004009955.3 | 2004-03-01 | ||
| PCT/EP2005/001652 WO2005083681A1 (en) | 2004-03-01 | 2005-02-17 | Device and method for determining a quantiser step size |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2557777A1 CA2557777A1 (en) | 2005-09-09 |
| CA2557777C true CA2557777C (en) | 2012-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CA2557777A Expired - Lifetime CA2557777C (en) | 2004-03-01 | 2005-02-17 | Device and method for determining a quantiser step size |
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|---|---|
| US (2) | US7574355B2 (en) |
| EP (1) | EP1687810B1 (en) |
| JP (1) | JP4531805B2 (en) |
| KR (1) | KR100852481B1 (en) |
| CN (1) | CN1922656B (en) |
| AT (1) | ATE386320T1 (en) |
| AU (1) | AU2005217508B2 (en) |
| BR (1) | BRPI0507229A (en) |
| CA (1) | CA2557777C (en) |
| DE (2) | DE102004009955B3 (en) |
| ES (1) | ES2302185T3 (en) |
| IL (1) | IL176688A (en) |
| NO (1) | NO338935B1 (en) |
| PT (1) | PT1687810E (en) |
| RU (1) | RU2329549C2 (en) |
| WO (1) | WO2005083681A1 (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004009955B3 (en) | 2004-03-01 | 2005-08-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device for determining quantizer step length for quantizing signal with audio or video information uses longer second step length if second disturbance is smaller than first disturbance or noise threshold hold |
| US7702161B2 (en) * | 2005-10-28 | 2010-04-20 | Aspeed Technology Inc. | Progressive differential motion JPEG codec |
| FR2898443A1 (en) * | 2006-03-13 | 2007-09-14 | France Telecom | AUDIO SOURCE SIGNAL ENCODING METHOD, ENCODING DEVICE, DECODING METHOD, DECODING DEVICE, SIGNAL, CORRESPONDING COMPUTER PROGRAM PRODUCTS |
| ATE509347T1 (en) * | 2006-10-20 | 2011-05-15 | Dolby Sweden Ab | DEVICE AND METHOD FOR CODING AN INFORMATION SIGNAL |
| KR101149448B1 (en) * | 2007-02-12 | 2012-05-25 | 삼성전자주식회사 | Audio encoding and decoding apparatus and method thereof |
| CN101308655B (en) * | 2007-05-16 | 2011-07-06 | 展讯通信（上海）有限公司 | Audio coding and decoding method and layout design method of static discharge protective device and MOS component device |
| EP2077551B1 (en) | 2008-01-04 | 2011-03-02 | Dolby Sweden AB | Audio encoder and decoder |
| US8559742B2 (en) * | 2008-10-10 | 2013-10-15 | Accusoft Corporation | Image encoding methods and apparatus providing improved visual results |
| KR102814254B1 (en) | 2010-04-09 | 2025-05-30 | 돌비 인터네셔널 에이비 | Mdct-based complex prediction stereo coding |
| US8891775B2 (en) | 2011-05-09 | 2014-11-18 | Dolby International Ab | Method and encoder for processing a digital stereo audio signal |
| KR20130047643A (en) * | 2011-10-28 | 2013-05-08 | 한국전자통신연구원 | Apparatus and method for codec signal in a communication system |
| WO2013113351A1 (en) * | 2012-01-30 | 2013-08-08 | Nokia Siemens Networks Oy | Processing a signal in station apparatus |
| JP5619326B2 (en) * | 2012-06-21 | 2014-11-05 | 三菱電機株式会社 | Encoding device, decoding device, encoding method, encoding program, decoding method, and decoding program |
| JP6302071B2 (en) * | 2013-09-13 | 2018-03-28 | サムスン エレクトロニクス カンパニー リミテッド | Lossless encoding method and lossless decoding method |
| WO2019049543A1 (en) * | 2017-09-08 | 2019-03-14 | ソニー株式会社 | Audio processing device, audio processing method, and program |
| KR102589303B1 (en) * | 2017-11-02 | 2023-10-24 | 삼성전자주식회사 | Method and apparatus for generating fixed point type neural network |
| DE102018112215B3 (en) * | 2018-04-30 | 2019-07-25 | Basler Ag | Quantizer determination, computer readable medium, and apparatus implementing at least two quantizers |
| US10762910B2 (en) | 2018-06-01 | 2020-09-01 | Qualcomm Incorporated | Hierarchical fine quantization for audio coding |
| US11701278B2 (en) | 2019-08-23 | 2023-07-18 | Hill-Rom Services. Inc. | Technologies for efficiently tracking the location of a patient bed |
| TWI726822B (en) | 2019-10-08 | 2021-05-01 | 創未來科技股份有限公司 | Signal converting apparatus |
| CN115052309A (en) * | 2021-03-09 | 2022-09-13 | 中兴通讯股份有限公司 | Interference detection method, device, equipment and storage medium |
Family Cites Families (47)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4751736A (en) * | 1985-01-31 | 1988-06-14 | Communications Satellite Corporation | Variable bit rate speech codec with backward-type prediction and quantization |
| EP0267344B1 (en) * | 1986-10-30 | 1993-09-01 | International Business Machines Corporation | Process for the multi-rate encoding of signals, and device for carrying out said process |
| NL8700985A (en) * | 1987-04-27 | 1988-11-16 | Philips Nv | SYSTEM FOR SUB-BAND CODING OF A DIGITAL AUDIO SIGNAL. |
| US5542008A (en) * | 1990-02-28 | 1996-07-30 | Victor Company Of Japan, Ltd. | Method of and apparatus for compressing image representing signals |
| ES2087522T3 (en) * | 1991-01-08 | 1996-07-16 | Dolby Lab Licensing Corp | DECODING / CODING FOR MULTIDIMENSIONAL SOUND FIELDS. |
| KR100312664B1 (en) * | 1991-03-29 | 2002-12-26 | 소니 가부시끼 가이샤 | Digital Signal Encoding Method |
| US5664057A (en) * | 1993-07-07 | 1997-09-02 | Picturetel Corporation | Fixed bit rate speech encoder/decoder |
| JPH07225598A (en) * | 1993-09-22 | 1995-08-22 | Massachusetts Inst Of Technol <Mit> | Method and device for acoustic coding using dynamically determined critical band |
| US5682463A (en) * | 1995-02-06 | 1997-10-28 | Lucent Technologies Inc. | Perceptual audio compression based on loudness uncertainty |
| US5754742A (en) * | 1995-05-12 | 1998-05-19 | Intel Corporation | Setting quantization level to match DCT coefficients |
| JPH0944198A (en) * | 1995-07-25 | 1997-02-14 | Victor Co Of Japan Ltd | Quasi-reversible encoding device for voice |
| US5692102A (en) * | 1995-10-26 | 1997-11-25 | Motorola, Inc. | Method device and system for an efficient noise injection process for low bitrate audio compression |
| US5924064A (en) * | 1996-10-07 | 1999-07-13 | Picturetel Corporation | Variable length coding using a plurality of region bit allocation patterns |
| KR100261254B1 (en) * | 1997-04-02 | 2000-07-01 | 윤종용 | Scalable audio data encoding/decoding method and apparatus |
| KR100261253B1 (en) * | 1997-04-02 | 2000-07-01 | 윤종용 | Scalable audio encoder/decoder and audio encoding/decoding method |
| US6064954A (en) * | 1997-04-03 | 2000-05-16 | International Business Machines Corp. | Digital audio signal coding |
| RU2214047C2 (en) * | 1997-11-19 | 2003-10-10 | Самсунг Электроникс Ко., Лтд. | Method and device for scalable audio-signal coding/decoding |
| KR100335609B1 (en) * | 1997-11-20 | 2002-10-04 | 삼성전자 주식회사 | Scalable audio encoding/decoding method and apparatus |
| US6115689A (en) * | 1998-05-27 | 2000-09-05 | Microsoft Corporation | Scalable audio coder and decoder |
| JP3784993B2 (en) * | 1998-06-26 | 2006-06-14 | 株式会社リコー | Acoustic signal encoding / quantization method |
| US6363338B1 (en) * | 1999-04-12 | 2002-03-26 | Dolby Laboratories Licensing Corporation | Quantization in perceptual audio coders with compensation for synthesis filter noise spreading |
| US6246345B1 (en) * | 1999-04-16 | 2001-06-12 | Dolby Laboratories Licensing Corporation | Using gain-adaptive quantization and non-uniform symbol lengths for improved audio coding |
| US6446037B1 (en) * | 1999-08-09 | 2002-09-03 | Dolby Laboratories Licensing Corporation | Scalable coding method for high quality audio |
| DE19947877C2 (en) * | 1999-10-05 | 2001-09-13 | Fraunhofer Ges Forschung | Method and device for introducing information into a data stream and method and device for encoding an audio signal |
| TW499672B (en) * | 2000-02-18 | 2002-08-21 | Intervideo Inc | Fast convergence method for bit allocation stage of MPEG audio layer 3 encoders |
| KR20080099326A (en) * | 2001-01-16 | 2008-11-12 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Linking of Signal Components in Parametric Encoding |
| US7286715B2 (en) * | 2001-03-28 | 2007-10-23 | Sony Corporation | Quantization apparatus, quantization method, quantization program, and recording medium |
| WO2002082425A1 (en) * | 2001-04-09 | 2002-10-17 | Koninklijke Philips Electronics N.V. | Adpcm speech coding system with specific step-size adaptation |
| DE10129239C1 (en) | 2001-06-18 | 2002-10-31 | Fraunhofer Ges Forschung | Audio signal water-marking method processes water-mark signal before embedding in audio signal so that it is not audibly perceived |
| US6950794B1 (en) * | 2001-11-20 | 2005-09-27 | Cirrus Logic, Inc. | Feedforward prediction of scalefactors based on allowable distortion for noise shaping in psychoacoustic-based compression |
| US7027982B2 (en) * | 2001-12-14 | 2006-04-11 | Microsoft Corporation | Quality and rate control strategy for digital audio |
| US7146313B2 (en) * | 2001-12-14 | 2006-12-05 | Microsoft Corporation | Techniques for measurement of perceptual audio quality |
| US20040002859A1 (en) | 2002-06-26 | 2004-01-01 | Chi-Min Liu | Method and architecture of digital conding for transmitting and packing audio signals |
| AU2003247040A1 (en) * | 2002-07-16 | 2004-02-02 | Koninklijke Philips Electronics N.V. | Audio coding |
| KR100477699B1 (en) * | 2003-01-15 | 2005-03-18 | 삼성전자주식회사 | Quantization noise shaping method and apparatus |
| JP4212591B2 (en) * | 2003-06-30 | 2009-01-21 | 富士通株式会社 | Audio encoding device |
| DE102004007184B3 (en) * | 2004-02-13 | 2005-09-22 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and apparatus for quantizing an information signal |
| DE102004007200B3 (en) | 2004-02-13 | 2005-08-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device for audio encoding has device for using filter to obtain scaled, filtered audio value, device for quantizing it to obtain block of quantized, scaled, filtered audio values and device for including information in coded signal |
| DE102004007191B3 (en) | 2004-02-13 | 2005-09-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio coding |
| DE102004009955B3 (en) * | 2004-03-01 | 2005-08-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device for determining quantizer step length for quantizing signal with audio or video information uses longer second step length if second disturbance is smaller than first disturbance or noise threshold hold |
| JP2008000002A (en) * | 2004-09-30 | 2008-01-10 | Sysmex Corp | NUCLEIC ACID AMPLIFICATION PRIMER FOR DETECTING RIBULOSE BISPHOSPHATE CARBOXYLASE SMALL CHAIN 1A (RBCS-1A) GENE AND/OR mRNA OF THE GENE AND INSPECTION METHOD USING THE GENE AND/OR mRNA OF THE GENE AS INTERNAL STANDARD |
| US7668715B1 (en) * | 2004-11-30 | 2010-02-23 | Cirrus Logic, Inc. | Methods for selecting an initial quantization step size in audio encoders and systems using the same |
| JP4765521B2 (en) * | 2005-09-30 | 2011-09-07 | 株式会社日立製作所 | Variable gain amplifier |
| JP4921180B2 (en) | 2006-01-25 | 2012-04-25 | キヤノン株式会社 | Radiation detection apparatus and radiation imaging system |
| JP4554561B2 (en) * | 2006-06-20 | 2010-09-29 | 株式会社シマノ | Fishing gloves |
| ATE509347T1 (en) * | 2006-10-20 | 2011-05-15 | Dolby Sweden Ab | DEVICE AND METHOD FOR CODING AN INFORMATION SIGNAL |
| US8204744B2 (en) * | 2008-12-01 | 2012-06-19 | Research In Motion Limited | Optimization of MP3 audio encoding by scale factors and global quantization step size |
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| WO2005083681A1 (en) | 2005-09-09 |
| WO2005083681A8 (en) | 2008-03-27 |
| HK1093596A1 (en) | 2007-03-02 |
| NO20064439L (en) | 2006-11-29 |
| ATE386320T1 (en) | 2008-03-15 |
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| BRPI0507229A (en) | 2007-06-26 |
| US20090274210A1 (en) | 2009-11-05 |
| NO338935B1 (en) | 2016-10-31 |
| IL176688A (en) | 2011-01-31 |
| KR20060121973A (en) | 2006-11-29 |
| JP4531805B2 (en) | 2010-08-25 |
| ES2302185T3 (en) | 2008-07-01 |
| CN1922656B (en) | 2010-04-14 |
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| DE502005002824D1 (en) | 2008-03-27 |
| AU2005217508A1 (en) | 2005-09-09 |
| DE102004009955B3 (en) | 2005-08-11 |
| RU2006130966A (en) | 2008-03-20 |
| EP1687810B1 (en) | 2008-02-13 |
| AU2005217508B2 (en) | 2008-05-15 |
| US8756056B2 (en) | 2014-06-17 |
| PT1687810E (en) | 2008-05-23 |
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